1. Sem 1 Chapter 13 The Session Layer

2. The session layer establishes, manages, and terminates sessions between applications. This includes starting, stopping, and resynchronizing two computers who are having a "rap session."

3. Another analogy to help understand what the session layer does is to re-use this same analogy, but this time you are communicating with a pen pal via the postal service. The same problems might occur. Messages could pass each other because you haven't agreed to use two-way simultaneous communication rather than two-way alternate control; or you could experience poor communication because you haven't synchronized the subjects of your conversations.

4. The student develop a clear understanding of the two major forms of dialog control -- two-way alternate and two-way simultaneous. As an activity, first toss a paper (representing data) back and forth to one of the students. This represents two-way alternate communication. Then have each person throwing a piece of paper simultaneously (it may require some concentration to keep this going!) -- this represents two way alternate communication.

5. The purpose of this target indicator is to convey the somewhat abstract idea of minor (one way) and major (two way) synchronizations. Point out that the vertical axis is time.
Checkpointing are used to separate parts of a session, previously referred to as dialogues.
Dialogue separation is the orderly initiation, termination, and managing of communication.

6. NFS is a common Layer 5 protocol.